"structures" newsreels and historical clips

... an earthquake.

Laboratory of seismologists.

Design bureau.

View of the city from the top point.

Laboratory of the theory of seismic resistance of structures of the V.A. Kucherenko TSNIISK.

Seismic resistance tests of various models.

A house in Severobaikalsk with switching off adaptive connections.

Residential ...

... exhibits of the historical museum.

The movement of cars on the streets of the city.

Bridge over the river.

The control panel of the nuclear power plant.

Structures at oil fields in the sea.

The hull of the ship.

Metal connections of bridge parts.

Pipes for wells.

Pipes damaged by corrosion.

Alternating frames ...

... explaining the change in the state of metal in contact with water.

Shots with iron oxide on metal objects.

The spread of rust.

Corrosion in building structures.

The reinforcement loses its bearing capacity, the metal becomes loose, accidents are possible.

As a sample of a metal device operating in an aggressive ...

... combating metal corrosion are various coatings.

The roof of the landing stage of the Kiev railway station in Moscow.

Work on the protection of metal structures of the landing stage.

Manual method of applying a protective coating.

Cleaning surfaces before applying paint.

The cleaned surface is dedusted, freed ...

... tool.

When applying coatings, it is necessary to observe safety regulations.

Atmospheric drying of parts.

With mass, in-line production of metal structures, metal rolling cleaning lines are equipped.

Shot blasting machine for cleaning steel sheet.

The sheet enters a special steel chamber.

Cleaning takes ...

... large-sized building structures.

From the cleaning site, the structures are delivered to the receiving position of the automatic line.

Then into the flushing chamber for degreasing.

Spray system.

The alkaline solution reliably washes complex structures.

Washing in clean water.

Drying.

The structure is supplied ...

Along the lines of force of the magnetic field, its droplets are applied to the surface of the structure and tightly connected to the metal.

Drying.

The primer dries completely.

After cooling, the structures arrive at the painting post.

The paint is applied in the same way as the primer, by spraying in ...

... coating requires multi-stage preparation.

First, the structures are degreased in a special solution.

Then they are etched in sulfuric acid, where in a few minutes the surface of the workpieces is cleaned from rust.

In the next bath, the structures are washed in hot water.

They are coated with a flux ...

... To work in particularly aggressive environments, aluminum protection of steel structures is used.

The process of aluminizing begins with cleaning the metal in a shot blasting machine.

A large worker on the line.

The structure enters an electric furnace, into a bath with molten aluminum.

Passing through ...

... is an immiscible liquid with water.

In the 60s of the XIX century, A.M. Butlerov, a professor at Kazan University, created the concept of chemical structure as the order of bonding of atoms.

Books written by A.M. Butlerov.

Tertiary butyl alcohol and diethyl ether differ in the order of atomic bonding. ...

... Hendrik Van Hoff.

The basis of his hypothesis was the idea of the tetrahedral spatial structure of the carbon atom.

Image of the structure of a carbon atom.

One of the methods for determining the geometric structure of molecules is X-ray diffraction analysis.

Equipment for carrying out such an analysis ...

... orientation of the valence.

A model of a molecule at the Brussels exhibition in the form of a large metal structure.

In fact, the atoms inside the molecule are packed very tightly.

A sample of such a structure, a hemispherical model.

Van der Waals radius.

... even touch each other.

This increases the energy of such conformations and makes their existence unprofitable.

Let's consider other features of the structure of molecules based on the fluorochlorobromethane molecule.

We will replace the hemispherical model with a spherical rod.

Let's swap two atoms.

A comparison ...

... axis, we return to the original structure.

Consequently, the existence of optical antipodes is also possible for connections with axes of symmetry.

Chiral molecules.

Achiral molecules.

Modern methods make it possible to detect subtle features of the spatial structure of molecules and even notice the ...

... cleavage of E2.

Bimolecular anti-cleavage.

Without taking into account stereochemical factors, it is impossible to make a complete picture of the structure of the substance and the processes occurring during chemical reactions.

U.S. scientists are studying the structure of teeth ichthyologists fish.

... metal-cutting machines.

A cartoon explaining the principle of stereovision in robotics.

Structured illumination can be used to recognize three-dimensional details.

A cartoon explaining the principle of structured illumination.

Continuation of the story of Candidate of Technical Sciences V.I. Rybak.

The ...

... bacteria by lymphoid cells (shooting under a microscope).

The structure of lymphoid tissue.

Taking lymph for analysis.

Portrait of the English physiologist Starling.

Movement of lymph in the lymphatic capillary (animation).

The structure of the lymphatic capillary wall (animation).

Experience with a ...

... a dog - the introduction of a foreign suspension under the skin.

The structure of lymphatic capillaries (animation).

Movement of lymph through lymphatic vessels (animation).

Laboratory experience (speed of lymph movement).

The structure of the lymph node (animation).

The doctor examines the X-ray.

Lymph node transport function (animation).

Barrier function of the lymph node (animation).

Operating room, an operation ...